Dust-guard.



No. 810,038. PATENTED JAN. 16, 1906. E. DENEGRE.

DUST GUARD.

APPLICATION FILED JAN. 3, 1904. v

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UNITED STATES EDWARD DENEGRE, OF CHICAGO,

PATENT OFFICE.

ILLINOIS, ASSIGNOR TO MoCORD &

DUST-GUARD.

Specification of Letters Patent.

Patented Jan. 16, 1906.

Application filed January 8. 1904. Serial No. 188,155.

To aZZ whom it may concern.-

Be it known that I, EDWARD DENEGRE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Dust-Guards; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention has for its object to provide an improved dust-guard forcar-axle journalboxes; and to this end my invention consists of thenovel devices and combinations of devices hereinafter described, anddefined in the claims.

The invention is illustrated in the accompanying drawings, wherein likenotations refer to like parts throughout the several views.

In said drawings, Figure 1 is a view, chiefly in vertical section, butwith some parts shown in elevation, others removed, and others brokenaway, showing my improved dustguard in working position. Fig. 2 is aview in vertical section on the line 412 m of Fig. 1. Fig. 3 is a viewshowing the sectional guardplate detached and the two sections separatedFig. 4 is a view showing one of the sections of the guard-plate in edgeelevation or at right angles to Fig. 3. Fig. 5 is a detail incross-section on the line 110 m of Fig. 2. Fig. 6 is a detail incross-section on'the line as w of Fig. 3; and Fig. 7 is a view showingthe retaining-washer for the packing-ring in elevation, detached, withthe two sections of the washer separated from each other.

The reference-letters a a a represent parts of the car-axle, the part abeing the body portion of the axle, a the journal portion thereof, and athe partof the axle intermediate of the journal portion a and the bodyportion a, and which part a is subject to the action of the dust-guard.

The journal-box Z) may be of the ordinary or any suitable constructionand is provided with a faced or machined raised boss 6, surrounding theaxle-passage at the inner end of the box and adapted to serve as thejoint surface to be packed. The box 6 is also provided with a lockflange or lug b at the top of its inner end and with keeper-lugs b onits inner end face.

The guard-plate is of sectional form, being composed of two sections,each having the body or semicircular portion 0 and the pair of lateralextensions or ear-like lugs c. The lugs 0 at the top of the guard-plateare each provided with hook-like extensions 0 adapted to engage over thelock-flange b of the box when the guard-plate is in working position, asshown in Fig. 1. The ear-lugs c of the guard-plate sections are alsoprovided with interlocking parts 0 and c of male and female form,adapted to engage with each other and to lock the two sections of theguard-plate together when in working position. As shown, the male ordowel members 0 are on one section of the guard-plate, and the femalememhere or cooperating perforated flanges c are on the other member ofthe guard-plate, these interlocking parts being raised on the faces ofthe ear-lugs 0, so as to permit the same to interlock, while permittingthe two sections of the guard-plate to be drawn tightly together, asshown in Fig. 2. The body portions 0 of the sectional guard-plate are ofsemicircular form, adapting the same to encircle the axle, and areprovided on their faces each with a raised flange c properly positionedto afliord a seat 0 for corresponding sectional packing-ring d. Thesectional packing-ring "(Z is preferably composed of gray iron, but maybe composed of any other suitable material adapted to the purpose, andthe two sections thereof are of a proper size to closely fit the portiona of the axle when in working position and to properly pack the same.The packing-ring d is removably secured to its seat 0' on theguard-plate in any suitable way. The means shown for the purpose are asecthe face of the ring, and nutted bolts (V, the heads of which arecountersunk in the guardplate and the stems of which work through thepacking-ring sections and the sections of the washer b, the nuts beingapplied at the exterior of the washer, as clearly shown in Figs. 1 and2.

The box I) has keeper-lugs b on its rear end face above and belowtheaxle-passage, between which the lugs c of the guard -plate extend whenin working position, and are adapted to be engaged by the body portionsof half-elliptic clamping-springs e, the ends of which engage with thekeeper-lugs b of the box. These springs e are sprung and driven intoplace after the guard-plate is applied in working position, thus beingapplied tional retaining-washer d, adapted to overlie under compressionand serving to yieldingly clamp the guard-plate and the packing-ring tothe box, and the said springs a are strong enoughto sustain the'weightof theguardplate and the packing-ring by the clamping friction securedthereby, thus taking the load of the dust-guard in all positions whichit may assume relative to the box, and thus relieving the axle from anywear and tear which would otherwise be produced if the weight of thedust-guard was permitted to be taken by the axle itself. The portion ofthe guard-plate 0 which cooperates with the face of the boxboss 6 isfaced or machined to a corresponding true surface, so that when theguard-plate is in working position and under the yielding clampingaction from the springs e the jointsurface at the face of the boss Z)will be tightly packed by the guard-plate, thus affording a dust-tightjoint between the guard-plate and the box. Then as the guard-platecarries the sectional packing-ring d, which closely fits the portion aof the axle, the joint with the axle will be tightly packed thereby. Thesections of the packing-ring cl are of course of a greater radial widththan the flat portion of the seat for the same on the guard-plate 0, or,otherwise stated, the inner circle of the packing-ring is of lessdiameter than the inner circle of the semicircular part or body portionof the guardplate, so that the guard plate itself never comes in contactwith the axle.

With this improved dust-guard constructed as hereinbefore described itis of course obvious that the entire guard will move across the face ofthe rear end of the box, as may be required under the motions peculiarto the service and as may be required to compensate for the wearing downof the brasses 6* or the keys 6", or both.

One great advantage of this form of dustguard is that the sectionalpacking-ring is removably seated on the guard-plate and may at will beremoved therefrom without removing the guard-plate from the box. This isa great convenience whenever replacement is required.

Another highly-convenient feature of this improved dust-guard isincidental to the sectional construction of the guard-plate, whichfeature permits the entire guard-plate to be removed from the box andthe axle whenever so desired without the separation of the axle and thebox.

The means shown for yieldingly clamping the dust-guard to the box is anextremely simple and convenient one, while atthesame time it has provedin practice to be highly efficient for the purpose had in view.

The dust-guard herein disclosed has been extensively used in actualservice, and the efficiency thereof has been fully demonstrated.

The special purpose of the hooks c on the guard-plate sections is toprevent the loss of the dust-guard in case the springs a should by anypossibility become lost.

The special form of clamping devices herein disclosed for yieldinglyclamping the dustguard to the box in proper working position does not ofcourse depend upon the sectional form of the guard-plate hereindescribed nor on the particular location of the packing-ring hereinshown. Some of the other details of the construction might also bevaried without departing from the principle of my invention.

It should be noted that the guard-plate, as shown, is interposed betweenthe packingring and the rear end of the box and that the space betweenthe dust-guard and the hub of the carwheel f is suflicient to permit theremoval of the packing-ring.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is as follows:

1. The combination with a journal-box, of a guard-plate, a sectionalpacking-ring, and means for yieldingly clamping said parts to the box,the said guard-plate being interposed between the packing-ring and thebox, and said packingring being removable, from the box independently ofthe guard-plate, substantially as described.

2. The combination with a journal-box, of a guard-plate, a sectionalpackingring seated in the outer face of the guard-plate, and means foryieldingly clamping said parts to the box, the said guard-plate beinginterposed between the packing-ring and the box, and said packingringbeing removable from the box independently of the guard-plate,substantially as described.

3. Thecombination with a journal-box, of a sectional guard-plate, asectional packingring, and means for yieldingly clamping said parts tothe box, the said guard-plate being interposed between said packing-ringand the box, and the said packing-ring being removable from the boxindependently of the guardplate, whereby the packingring or the entireICC dust-guard can be removed at will, without EDWARD 'DENEGRE.

Witnesses:

H. D. HOUGHTALING, JAMEs D.-DENEGRE.

